Spring motor



March 2 1926.

H. T. KINGSBURY SPRING MOTOR Filed August 30, 1922 Patented Mar. 2, 192 6.

HARRY T. KINGSBURY, OF KEENE, NEW HAMPSHIRE.

SPRING MOTOR.

Application filed August 30, 1922. Serial No. 585,288.

To aZZ whom it may concern:

Be it known that I, HARRY T. KINGsBURY, a citizen of the United States, residing at Keene, in the county of Cheshire, State of New Hampshire, have invented certain new and useful Improvements in Spring Motors,

of which the following is a. description, ref.

erence being had to the accompanying drawing, and to the figures of reference marked thereon.

Theinvention relates to new and useful improvements in spring motors' The object of the invention is to provide a casing for a spring motor in which a firm backing is given the crown gear to hold it in mesh with the pinion gear and absolutely prevent the disengagement of the .gears, without rigidly securing the crown gear to its winding shaft or stem.

Another object of the invention is to provide a motor of this character in which the crown gear is provided with additional guides for preventing the transverse movement of the same, and thus relieve the winding shaft or stem of all the transverse strain.

A still further object of the invention is to provide a simple, cheap and effective motor having certain details of structure and combinations of parts hereinafter more fully described.

In the accompanying drawings:

Figure 1 is a top plan view of my spring motor;

Fig. 2 is a top plan view with the cover removed;

Fig. 3 is a sectional view on line 3-3 of Fig. 2;

Fig. 4 is a plan view of the casing with the spring and gear removed;

Fig. 5 is a sectional view of the casing and crown gear, the latter being removed from the casing; and

Fig. 6 is a transverse sectional view taken on the line 66 of Fig. 1, but showing the pinion in mesh with the crown gear.

Referring now to the drawings, 1 represents a casing which, as shown, is of a circular form and has at its center the downwardly depressed portion 2 which forms the spring retainer chamber. The depressing of the chamber 2 forms the flat flange 3 which has at its outer edge the flange 4 which forms a support for the cover plate 5 which, as shown, rests on the edge of the flange 4 and is secured thereto by ears 6 entering the notches 6 in the cover plate and turned over as shown in Fig. 1.

The cover plate, as shown in Fig. 1, is cutaway for the shaft 17, which is rotatably mounted in ears 7 and 8 carried by the easing, and said cover plate also has the winding stem 9 mounted therein and carrying the pawl 10 engaging the ratchet teeth 11 and a coil spring attached to the stem.

The winding stem 9, as heretofore stated, has a coil spring 12 attached thereto, and the opposite end of the coil spring is attached to one of the ears 13 of the crown gear 1a which meshes with the pinion 15 carried by the shaft 17. The crown gear 14, as shown, is formed with a flat body portion 16 having at its outer periphery the lateral flange 17 having the gear teeth 18 formed therein. The flat portion 16 is provided with the ears 13 which are arranged at certain intervals therearound and are formed by cutting out the metal of the flat portion, as shown in Fig. 5 of the drawings.

When the crown gear is in position and the cover plate clamped thereon, and the pinion in position, the flat body portion 16 of the gear rests upon the flat flange 3 of the casing 1 and is prevented from moving to the right away from the pinion 15 as shown in Fig. 6 of the drawings. This insures of a positive drive of the pinion by the crown gear and yet allows for any slight variation in the winding stem and other parts of the cover plate as the relative positions of the crown gear and the pinion are not changed.

It is obvious that minor changes in the details of construction and the arrangement of the parts may be made without departing from the spirit'of the invention as set forth in the appended claims.

Having thus described the invention, what I claim as new is:

l. A spring motor, comprising a casing having a spring receiving chamber, a lateral rim carried by the chamber, a crown gear attached to the spring and resting on the rim, and a pinion gear carried by the easing and engaging the crown gear.

2. A spring motor, comprising a casing having a spring receiving chamber, a lateral rim carried by the chamber, a crown gear resting on the rim and having inwardly extending lugs entering said chamber, a winding stem extending through the cas ing and the crown gear, a spring in the chamberand having one end secured to the stem and the opposite end securedto-one of the lugs of the crown gear, and a pinion mounted in the casing and enga ing the crown gear, the rim f reventing the disengagement of the crown gear from the pinion. 7

3. A spring motor comprising a casing, an annular rim, a crowirgear loosely rest ing on said rim, a coil spring for rotating the crown gear, a-windi n-g stem carriedhy the casing and passing through the crown gear, and a pinion mounted in the casing and engaging the crown gear, and the rim preventing the moven'ient oi the crown gear away from thepinion.

l. A. spring motorcomprising a casing, an annular rim inthe casing, a. crown gear loosely resting on said rim, ai coil spring for rotating the crown gear, a winding 'stem'carried by the casing and loosely passing through'the crown gear, a sha'tt carried by; the casing in a plane parallel with the plane of the rim, and a pinion carried by the shaft'and engaging'the crown gear, the rim preventing the disengagement ot the crown gear from the pinion.

5 A spring motor comprising cylindrical shaped housing having an annular flat rim extending at. right angles, a crown gearrest ing on the rim, awinding stem passingthrough the housing and the crown gear, a

springin the cylindrical housing and having, one end fastened to the stem and the other to the crown gear, a shaft mounted in the housing in a plane parallel with the plane otthe rim,aand .a pinion carried by the shaft and meshing with the crown gear whereby the rim prevents the longitudinal movement of the crown gear in the housing. awayutrom: the pinion. V

6. A spring motor comprising a casing, an annular flange carried-thereby,the crown gear restingon the rim and having inward- 1y extending lugs entering the chaml ier, a spring in the chamber and having one end connected to the lugs-and the opposite: end connectedto a winding shaft and a pinion mounted in the casing and engaging the crown gear, the rim preventing the disengagement of the'crown gear from the pinion.

7. A spring motor: comprising a casing, an annular rim in the casing, a crown gear loosely resting on said rim, a coil spring for rotating the crown gear, a winding stem car ried by the casing, a pinion mounted in the casing and engaging the crown gear, the rim pi-eventingthe movement of the crown gear away from the pinion.

In testimony whereof,- I' aflix my signature.

HARRY 'l. KINGSBURY. 

